Unwinding device



Oct..A 5 19265 J- D. JOYCE- UNWINDING DEVICE Filed Jan. '7. 1926 2Sheets 5heei l Oct. 5 1926.

J.A D. JOYCE UNWINDING DEVICE 2 Sheets-snee"` 2 Filed Jan. 7, 1926flexible brake band Patented @et 5, 1926.

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JAMES DAIEL JOYCE, OF PHILADELPHIA, PENNSYLVANIA.

n UNWINDING DEVICE.

Application filed January 7, 1926.

rlhis invention relates to unwinding devices for regulating the deliveryof yarn, thread, and the like from rotating spools or bobbins.

lt is the prime object of my invention to control the rotation of thespool or bobbin in such a manner as to compensate for the shock of thestarting of thev winding operation and for the series of irregularvariations in speed of feeding due to the travers ing of the threadguide and vdue to the variations in diameter of thecone of yarn orthread being wound on the bobbin; and to prevent the spool fromoverrunning when the thread breaks or the tension thereon is relievedfor any reason; so that fine or delicate materials can be unwound athigh speeds without undue strain or breakage.

ln accomplishing these results it is my purpose to employ a flexiblecompensating arm forming one end of a coiled spring rotatably andadjustably mounted on al suitable rod and having a portion of saidcoiled spring formed to provide a suspension for a adapted to contactwith a brake drum on the spool holder.

Other objects of my invention will be found in the accompanyingspecification and claims and will be disclosed in the accompanyingdrawings in which:

Figure 1 is a perspective view of my device; y

Figure 2 is a side elevation of my device with the movable parts shownalso in dotted f lines.

Referring with greater particularity to the drawings it will be seenthat my device is comprised as follows: j

A substantially U-shaped frame 1 having arms l and 5 is provided with alplate 2 havingan aperture 3 for the reception of means to secure saidframe in position on the winding machine in connection with which it isto be used. Recesses 6 and 7 in the arms i and` 5 are adapted to receiveand to provide bearings for the ends of spool holder 8. Extendingupwardly from the juncture of the arm l with the main portion of theframe 1 is an arm 9 bored at 10 to provide for the reception of a rod 11which is fixed therein.

Mounted on the rod 11 and spaced from the bore 10 by a collar 12 is acoiled spring 13 of flexible steel wire. One end of said spring isextended to form a compensator arm 14. bent adjacent its end to form abearof the band 19 Serial No. 79,741.

ing for a rotatable thread guide or pulley 15. The other end of thespring 13 is fit-- ted into a collar 16 mounted on the rod 11 andadapted to be adjusted in its position on said rod by means of a setscrew 17. lntermediate of its ends the spring 13 hasja portion thereoflextending outwardly therefrom and then bent to form a loop 18 parallelto the rod 11. This loop extends over to a position adjacent the arm'9and above the spoolholder 8. A brake band 19 of flexible material issecured at one end to the loop and at its other end hasvsecured theretoaweight 20.

A stop 21 fixed to the arm 9 is bent above and parallel to the rod 11 toprovide a stop for the arm 14 in its upward motion. The spool holder 8is provided with a brake drum 22 against which the band 19 is adapted tobear. n

My device having been described in de# tail its operation will be seento be as follows:

The collar 16 is the spring to the proper of thread being used.

It will be noted that, when the arm1ll is against the stop 21, aconsiderable portion rst adjusted to tension degree for the type andthat since the loop end 18 extends out over the drum a strong brakingforce isv applied to the drum. This braking force prevents anyoverrunning of the spool when the draft on the thread is released aswhen the winding reaches the smaller'. end of the cone. When the windingreaches the larger end of the cone being wound, the amount of threadbeing wound will be greater and the draft on the thread will bend thecompensator arm downwardly moving the loop downwardly to a proportionateamount and releasing the portion of the brake band from contact with thedrum thereby decreasing the braking effect thereof and preventing thebreakage of the. thread under the sudden increase in draft.

I claim-'- 1. In combination, in an unwinding device, a frame, arotatable spool holder mounted in said frame and having a brake drumrotatable therewith, a compensator rod mounted in said frame, a coilspring mounted on and adjustably secured to said rod, one end of saidcoil spring terminating in a compensator arm and thread guide, aflexible brake band, a portion of said coil spring intere' bears againstthe drum 22 Cfr mediate of its ends being adapted to movablyp'supportsaid brake band in position to Contact VWith said brake drinn 2. Incombination, in an unwindihg device, a frame, a rotatable spool holdermounted in said frame and having a brake drum rotatable therewith, acompensztt'or rod mounted in said frame, a eoilnspring` mounted on andadjustably secure-d t'o said rod, one end of said Coil springterminating in a compensator arm and thread guide, a flexible brakeband, a portion of said coil spring intermediate of its ends beingadapted to mo'vably support said brake ,band in position lto Contactwith said brake drum, the movement of said compensator arm being adaptedto vary the degree of Contact of said brake bandivith said brake drum.

V3. In combination, in anunivindingvdevice, a frame, 4a rotatable yspoolholder mounted in said frame yand having a brake drum rotatabletherewith, 4a yCompensator rod mounted in said frame, a coil springmounted on and adjustably secured to said rod,

lin said frame, a 'adjustably secured to one end of said coil springterminating in a compensator arm and thread guide, a flexiblebrake band,a portion of said coil spring intermediate oi its ends being formed in aloop adapted to'support said brakeband in position to Contact With saidbrake drum.

"4. In combination, in an unwinding device, a frame, a rotatable spoolholder mounted in said frame and having a brake drum rotatabletherewith, a compensator rod'mounted coil spring mounted on and saidrod, one en d of said coil spring terminating in a ,compensator arm Aandthread guide, a flexible brake band, a portion of said coil springintermediate of its ends being formed in a loop adapted to support saidVbrake band in position to Contact Withs'aid brakedrum, and a stop tolimit the upward movement of said compensator arm. Y A x v In testimonywhereof I atliX my signature.

.TAMESWDANIEL Joven.

